Synthetic poppet valve



Feb. s, 1945.

C. J. SCHULER SYNTHETIC POPPE'T VALVE Filed Nov. 30, 19434 Egggsg! C2091. 5cm/15;

INVENTOR.

BY @I ATTORNEY.

Patented Feb. 6, 1945 UNITED STATES PATENT orifice SYNTHETIC POPPET VALVE Carl J. Schuler, Los Angeles, CaliL, assigner to Interstate Aircraft and Engineering Corp., a corporation of California Application Novemberl 30, 1943, Serial No. 512,323

s claims` (ci. 251-159) This invention relates to valves, particularly of the type known as poppet valves.

In the ordinary poppet valve as constructed the movable valve member or poppet is ordinarily Fig. 2 is a vertical sectional view of the valve member shown in Fig. 1;

Fig. 3 is a vertical side elevation or the core of the valve member shown in the preceding fig- The inlet port I1 opens The plastic Extendingfrom the lower end made of steel, having a. conical face which en- 5 ures, gages a steel or other metal composition seat. Fig. 4 is a sectional plan View on line l-l of In such valves it is necessary that the valve fbe Fig.2; and lapped in to the seat as it is necessary that the Fig. 5 is a bottom plan view of the valve memvalve and seat should make a tight t throughber shown in Fig. 2. out the engaging surfaces. These valves, due to lo Referring more particularly to the drawing. the engagement of metal against metal, very I indicates a valve casing having a valve chamoften score or get out of alignment and in many ber indicated at I I and a valve passage indicated instances, when a gritty' foreign matter lodges at I2, and a port indicated at I3 leading from on the seat the valve does not tightly close with the valve passage I2. The upper end of the valve consequent leakage past the valve. l chamber II is closed by a screw plug indicated It is an object of the present invention to proat I5, such plug having a threaded nipple I6 duce a valve member or valve in which a steel formed thereon through which an inlet port incore is employed having molded thereon a plasdicated at l1 extends. tic which entirely covers the core with the exn'ffO a recessed POItOn I3 0f the plug l5 Which ception of the foot or enlarged lower end which recess houses a coiled compressing Spring indis engaged by the lifting cam. In this structure Gated at 20. the upper end 0f Which bears against the body of plastic is molded to form a conical the end 0f the recess in the Plug and the lower surface for engagement with a valve seat, such end 0f which is Seated on 9' shoulder 2 formed conical surface being to a certain extent yieldon the Valve member genera1 ly intimated at 22- able permits a proper fitting of the valve member The Valve membelf 22 conslsts of a' Steel core on the seat Without the Ordinary lapping in 0p indicated at 23. This steel core formed at its eration and also in the event grit lodges upon the lowelf en@ with an enlarge@ fqot mdlcated at 24 seat, such grit imbeds itself in the conical surlgulaliugrainsllgeegga; g2g gensageaenot mterfere Wlth the with a series of circular grooves indicated at 26.

Another object of the iwention i t 0d Above the grooves and adjacent to the upper end s o pr uce of the core 1s a circular ilange indicated at 21.

a valve of the character described of simple form This core 23 is covered with the exc tion of and construction which is so made that the plasthe foot u with a mold d bod of las it be tic body of the valve is firmly secured to the metal 3.-, i d t d th t the t y l 'b core so that there is no parting or separation of I l ng un ers 00 a e erm -p as 1c em races the plastic body from the core rubber composltions and the like.

A th b, t f tu ht, d 1s molded on the steel core with the lower end v nov er o Jec o 1s inve' lon 1S t0 -plO ce 0f the plastic body abuttmg the shoulder 25 on a Valve of the charactfer descrbed of Slmple ,form the foot 24 and is provided at its upper end with and constlehon Whlch fequlres n? maehmmg 40 a shoulder 2I1ieretofore referred to which forms or lapping 1n fer p roper assembly Wlth the Valve a seat for the compression spring. Below the structfure m Whlch 1t 1s to be Sedflange 21 the sides of the plastic body are conical It 1s to be understood that the term plastic in shape as indicated at 28, such conical face as used herein has reference to and includes any being adapted to engage a valve Seat indicated synthetic or natural material or combinations 4f at 29 in Fig 1. thereof that is susceptible of being formed about 0f the plastic body to the conical seat 2s is a a Steel Core. plurality of longitudinal ribs indicated at 30.

Other Objects and advantages will appear here- These ribs space the body of plastic away from inafter from the following descriptions and drawthe sides of the passage I2 so that when the ing. 50 valve is open there is a free passage around the Referring to the drawing, which is for illusvalve member. trative purposes only- The foot 24 being of steel or other metal is Fig. 1 is a vertical sectional view of a valve asadapted to be engaged by a lifting cam indicated sembly showing mounted therein a valve embodyat 32 in Fig. 1. The cam as illustrated is formed ing a form of my invention; 55. as a part of a camshaft indicated at 33.

n* ir 2 asoma? From the above description it will be readily understood that the plastic is prevented from longitudinal movement on the metal core and that the ilange 2l on the core not only prevents longitudinal movement of the plastic on the core but also serves as reenforcement for the shoulder 2|, which is engaged by the spring 20. The iiange 2l also reentorces the plastic body directly above the conical seat engaging face of the valve member. In addition to the flange 2,1, the plastic body being molded into the recesses 26 on the core. an additional locking of the plastic body `on the core is accomplished.

The conical face of the valve member being of plastic it will adjust itself to the valve seat without the ordinary lapping in operation and insure a closure of the valve under all conditions as the valve is held upon the seat not only by the spring 20 but also by the pressure in the valve chamfber above the valve.

It is contemplated that various modiilcations and changes can be made in the invention as shown and described herein without departing from the scope of the invention and it is intended to cover such changes and modifications as come within the scope of the claims.

I claim as my invention:

1. A valve member comprsing; a metal core, an enlarged foot on one end of said core, a ange adjacent the other end of said core, a molded body of plastic on said core extending from said foot over the other end of said core, said molded body having a downwardly converging conical face formed thereon adapted for engagement with a valve seat. and a plurality of longitudinally extending ribs on said body formed as a part of said lbody and extending longitudinally from the conical face of said body.

2. A valve member comprising; a metal core. an enlarged toot on the lower end of said core, a flange adjacent the upper end of said core, a molded ibody of plastic extending from said foot over the upper end of said core, said molded body having a downwardly converging conical face formed thereon below the flange on said core adapted for engagement with a valve seat and a spring engageafble shoulder formed on said molded body above the flange on said 'core.

3. A valve member comprising; agmetal core having a plurality of circumferential grooves formed therein, an enlarged i'oot formed on the lower end of said core, a flange formed on said core adjacent to the upper end of said core, a molded body of plastic pn said core extending from the foot on said core over the upper end of said core, said molded body having a conical face formed thereon adapted for engagement with a valve seat, a plurality of longitudinal ribs on said body extending from the lower end oi said body to the conical face thereon, and a shoulder on said body above the flange on said core.

CARL J. SCHULER. 

